Skip to main content
SpringerLink
Log in

Study of complex formation between dicyclohexyl-18-crown-6 and UO2 2+ cation in some binary mixed non-aqueous solvents using conductometric method

  • Original Article
  • Published:
Journal of Inclusion Phenomena and Macrocyclic Chemistry Aims and scope Submit manuscript

Abstract

In the present work, the complexation process between UO2 2+ cation and the macrocyclic ligand, dicyclohexyl-18-crown-6 (DCH18C6) was studied in ethyl acetate/1,2-dichloroethane (EtOAc/DCE), acetonitrile/1,2-dichloroethane (AN/DCE), methanol/1,2-dichloroethane (MeOH/DCE) and ethanol/1,2-dichloroethane (EtOH/DCE) binary solutions at different temperatures using the conductometric method. The conductance data show that in most cases, the stoichiometry of the complex formed between DCH18C6 and UO2 2+ cation is 1:1 [M:L], but in some solvent systems also a 1:2 [M:L2] complex is formed in solutions. The values of stability constant of (DCH18C6·UO2)2+ complex which were obtained from conductometric data, show that the stability of the complex is affected by the nature and also the composition of the solvent system and in all cases, a non-linear behavior is observed for the variation of (log K f) of the (DCH18C6·UO2)2+ complex versus the composition of the binary mixed solvents. The values of thermodynamic quantities \( \Updelta H_{c}^{\circ} \) and \( \Updelta S_{c}^{\circ} \) for formation of (DCH18C6·UO2)2+ complex were obtained from temperature dependence of the stability constant using the van’t Hoff plots. The experimental results show that depending on the nature and composition of the solvent systems, the complex is enthalpy stabilized or destabilized, but in most cases, it is stabilized from entropy view point and both thermodynamic parameters are affected by the nature and composition of the binary mixed solutions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Scheme 1
Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

  1. Pederson, C.J.: Cyclic polyethers and their complexes with metal salts. J. Am. Chem. Soc. 89, 2495–2496 (1967)

    Article  Google Scholar 

  2. Anderson, T.B., Paulsen, E.S., Dearden, D.V.: Alkali metal binding energies of dibenzo-18-crown-6: experimental and computational result. Int. J. Mass Spectrom. 227, 63–76 (2003)

    Article  CAS  Google Scholar 

  3. Izatt, R.M., Pawlak, K., Bradshaw, J.S.: Thermodynamic and kinetic data for macrocyclic interaction with cations and anions. Chem. Rev. 91, 1721–2085 (1991)

    Article  CAS  Google Scholar 

  4. Hiraoka, M.: Crown Compounds. Their Characteristics and Applications. Kodansha, Tokyo (1982)

    Google Scholar 

  5. Izatt, R.M., Bradshaw, J.S., Nielsen, S.A., Lamb, J.D., Christensen, J.J.: Thermodynamic and kinetic data for cation macrocycle interaction. Chem. Rev. 85, 271–339 (1985)

    Article  CAS  Google Scholar 

  6. Rounaghi, G.H., Soorgi, M.H., Kazemi, M.S.: Effect of non-aqueous solvent on stoichiometry and selectivity of complexes formed between 4′-nitrobenzo-15-crown-5 with Fe3+, Y3+, Cd2+, Sn4+, Ce3+ and Au3+ metal cations. Russ. J. Inorg. Chem. 55, 355–360 (2010)

    Article  CAS  Google Scholar 

  7. Rounaghi, G.H., Tarahomi, S., Mohaeri, M.: A conductometric study of complexation reaction between dibenzo-24-crown-8 with yttrium cation in some binary mixed non-aqueous solvents. J. Incl. Phenom. Macrocycl. Chem. 63, 319–325 (2009)

    Article  CAS  Google Scholar 

  8. Rounaghi, G.H., Mohajeri, M., Doaei, M., Ghaemi, A.: Solvent influence upon complex formation between benzo-15-crown-5 and Mg2+, Ca2+, and Sr2+ cations in some pure and binary mixed solvents using conductometric method. J. Incl. Phenom. Macrocycl. Chem. 67, 443–450 (2010)

    Article  CAS  Google Scholar 

  9. Wagner-Czauderna, E., Koczorowska, A., Kalinowski, M.K.: Stability of 15-crown-5 and benzo-15-crown-5 complexes with alkali metal cations in nonaqueous media. J. Coord. Chem. 46, 265–276 (1999)

    Article  CAS  Google Scholar 

  10. Shamsipur, M., Popov, A.I.: Multinuclear NMR study of dibenzo-30-crown-10 complexes with sodium, potassium, and cesium ions in nonaqueous solvents. J. Am. Chem. Soc. 101, 4051–4055 (1979)

    Article  CAS  Google Scholar 

  11. Rounaghi, G.H., Gerey, N.G., Kazemi, M.S.: A conductometric study of complexation reactions between dibenzo-18-crown-6 (DB18C6) with Cu2+, Zn2+, Tl+ and Cd2+ metal cations in dimethylsulfoxide–ethyl acetate binary mixtures. J. Incl. Phenom. Macrocycl. Chem. 55, 167–172 (2006)

    Article  CAS  Google Scholar 

  12. Taghdiri, M., Rofouei, M.K., Shamsipur, M.: Conductance study of the thermodynamics of complexation of K+, Rb+, Cs+ and Tl+ ions with dibenzo-24-crown-8 in binary acetonitrile–nitromethane mixtures. J. Incl. Phenom. Macrocycl. Chem. 58, 181–186 (2007)

    Article  CAS  Google Scholar 

  13. Rounaghi, G.H., Popov, A.I.: Thermodynamic studies of the complexation of dibenzo-27-crown-9 and dibenzo-24-crown-8 with cesium ion in mixed nonaqueous solvents. J. Inorg. Chem. Acta 114, 145–149 (1986)

    Article  CAS  Google Scholar 

  14. Seller, R.M.: The radiation chemistry of nuclear reactor decontaminating reagents. Radiat. Phys. chem. 21, 295–305 (1983)

    Google Scholar 

  15. Rounaghi, G.H., Mohammad Zade Kakhki, R.: Thermodynamic study of complex formation between dibenzo-18-crown-6 and UO2 2+ cation in different non-aqueous binary solutions. J. Incl. Phenom. Macrocycl. Chem. 63, 117–122 (2009)

    Article  CAS  Google Scholar 

  16. Ansari Fard, M., Rounaghi, G.H., Chamsaz, M., Taheri, K.: Study of complex formation between 18-crown-6 and diaza-18-crown-6 with UO2 2+ cation in some binary mixed aqueous and non-aqueous solvents. J. Incl. Phenom. Macrocycl. Chem. 64, 49–56 (2009)

    Article  CAS  Google Scholar 

  17. Rounaghi, G.H., Nazari, E., Ghaemi, A., Mohajeri, M.: Complex ability of a macrocyclic ligand, dibenzo-24-crown-8, with UO2 2+ in some binary mixed non-aqueous solvents. J. Coord. Chem. 63, 2349–2359 (2010)

    Article  CAS  Google Scholar 

  18. Ansari Fard, M., Rounaghi, G.H., Chamsaz, M., Taheri, K.: Study of complex formation between diaza-15-crown-5 with uranyl cation in some binary mixed aqueous and non-aqueous solvents. Asian J. Chem. 21, 2799–2806 (2009)

    CAS  Google Scholar 

  19. Joshaghani, M., Gholivand, M.B., Ahmadi, F.: Spectrophotometric and conductometric study of complexation of salophen and some transition metal ions in nonaqueous polar solvents. Spectrochim. Acta A 70, 1073–1078 (2008)

    Article  Google Scholar 

  20. Ganjali, M.R., Rohollahi, A., Moghimi, A., Shamsipur, M.: Conductance study of alkali metal complexes with 4′-carboxy-benzo-24-crown-8 and 4′-amido-benzo-24-crown-8 in nitromethane, acetonitrile and dimethylformamide solutions. Pol. J. Chem. 70, 1172–1181 (1996)

    CAS  Google Scholar 

  21. Genplot, A.: Data Analysis and Graphical Plotting Program for Scientist and Engineers. Computer Graphic Service Ltd., Ithaca (1989)

    Google Scholar 

  22. Rounaghi, G.H., Arbab Zavvar, M.H., Badiee, K., Boosaidi, F., Kazemi, M.S.: A thermodynamic study of complexation of 18-crown-6 with Zn2+, Tl+, Hg2+ and UO22+ cations in acetonitrile–dimethylformamide binary media and study the effect of anion on the stability constant of (18C6-Na+) complex in methanol solutions. J. Incl. Phenom. Macrocycl. Chem. 59, 363–369 (2007)

    Article  CAS  Google Scholar 

  23. Gokel, G.: Crown Ether and Cryptands, chap. 3. The Royal Society of Chemistry, London (1991)

Download references

Acknowledgment

The authors gratefully acknowledge the support of this research by Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran.

Author information

Authors and Affiliations

  1. Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran

    F. Razghandi & G. H. Rounaghi

  2. Department of Chemistry, Piam Noor University of Mashhad, Mashhad, Iran

    Z. Eshaghi

Authors
  1. F. Razghandi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. G. H. Rounaghi
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Z. Eshaghi
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to G. H. Rounaghi.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Razghandi, F., Rounaghi, G.H. & Eshaghi, Z. Study of complex formation between dicyclohexyl-18-crown-6 and UO2 2+ cation in some binary mixed non-aqueous solvents using conductometric method. J Incl Phenom Macrocycl Chem 73, 87–92 (2012). https://doi.org/10.1007/s10847-011-0023-6

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10847-011-0023-6

Keywords

Search

Navigation